<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      .box {
        width: 300px;
        margin: 0 auto;
      }
      .mydiv {
        width: 300px;
        height: 50px;
        border: 1px solid black;
      }
      .div1 {
        height: 60px;
        background-color: yellow;
      }
      .div2 {
        height: 40px;
        background-color: greenyellow;
      }
      .div3 {
        height: 100px;
        background-color: orange;
      }
      .div4 {
        font-size: 0;
      }
      .div4 > div {
        height: 100%;
        border: 1px solid black;
        display: inline-block;
      }
      .div4 > div:nth-of-type(1) {
        width: calc(40% - 3px);
        background-color: blueviolet;
      }
      .div4 > div:nth-of-type(2) {
        width: 60%;
        background-color: aqua;
      }
      .div5 {
        height: 300px;
        background-color: rgb(238, 160, 160);
      }
      .div5 > div {
        height: 100%;
        border-radius: 50%;
        background-image: url("../other/cursor.png");
      }
    </style>
  </head>
  <body>
    <div class="box">
      <div class="mydiv div1"></div>
      <div class="mydiv div2"></div>
      <div class="mydiv div3"></div>
      <div class="mydiv div4">
        <div class="div4-1"></div>
        <div class="div4-2"></div>
      </div>
      <div class="mydiv div5">
        <div></div>
      </div>
    </div>
  </body>
</html>
